btrfs: zoned: decode 'RECLAIM_ZONES' state in tracepoints

Decode the 'RECLAIM_ZONES' state in tracepoints, as of now only the
numerical state is shown in the tracepoints.

Reviewed-by: Boris Burkov <boris@bur.io>
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>

include/trace/events/btrfs.h

@@ -114,6 +114,7 @@ struct btrfs_log_ctx;
 	EM( ALLOC_CHUNK_FORCE,		"ALLOC_CHUNK_FORCE")		\
 	EM( RUN_DELAYED_IPUTS,		"RUN_DELAYED_IPUTS")		\
 	EM( COMMIT_TRANS,		"COMMIT_TRANS")			\
+	EM( RECLAIM_ZONES,		"RECLAIM_ZONES")		\
 	EMe(RESET_ZONES,		"RESET_ZONES")
 
 #define TRANSACTION_STATES							\